Existing ACCRE groups: Let us help you use ACCRE to your fullest potential.
Jun. 24, 2019—Following best practices in an HPC cluster to ensure job performance and reliability may not be as trivial as it seems, especially with massive workloads, complex pipelines or parallel jobs. ACCRE users and groups can take advantage of our consulting services to optimize their workflow in order to maximize the output of their computations. This...
GPFS data migration to run most weekends, starting tonight
Jun. 7, 2019—Beginning tonight we will kick off a data migration between different pools of storage in our GPFS23 filesystem (/scratch and /data). Hot data (files that have been accessed more recently) will be moved to faster, more expensive storage while cold data (files that have not been accessed recently) will be moved to more economical storage...
Custom/private gateway work is complete
May. 1, 2019—Update, 5/10: The work is now complete. On Friday, May 10 beginning at 8:30AM we will be taking custom/private gateways offline in order to reboot and upgrade the operating system to CentOS 7.6 from 7.4 and the GPFS filesystem to 5.0.2 from 4.2.3. We expect these upgrades to last roughly 1-2 hours. If this time...
4/24/2019: Turbo-Charged Machine Learning: Fitting Models Fast with H2O with Jesse Spencer-Smith
Apr. 22, 2019—Jesse Spencer-Smith, Chief Data Scientist at the Vanderbilt Data Science Institute, presented on April 24, 2019. Due to technical difficulties we couldn’t record this seminar, however materials are available at the following repo on GitHub: https://github.com/vanderbilt-data-science/turbo_h2o Abstract: The model fitting stage of a data science workflow has always been compute-intensive. Combine this with a need...
GPFS outage resolved; check output of running jobs
Apr. 19, 2019—Around 2PM today a GPFS manager node had an issue and caused the GPFS filesystem’s to hang across the cluster, making logins and file access unresponsive. The issue was corrected at 3PM today and all compute nodes seem to have recovered. Please check the output of running jobs just to be safe.
Scheduled maintenance on public gateways complete
Apr. 18, 2019—Original post: This Saturday morning, April 20th, we will be taking the public gateway and portal servers offline from 7 am to 9 am in order to reboot and upgrade the operating system to CentOS 7.6 from 7.4 and the GPFS filesystem to 5.0.2 from 4.2.3. Updating the entire cluster to GPFS 5 is an...
ACCRE networking problems fixed; make note of rules of thumb when reading or writing data to the cluster
Apr. 9, 2019—Update, 4/10/2019: Early this morning we applied some changes that appear to have resolved the network stability issues we were having yesterday. Feel free to resume normal activities on the cluster. We apologize for the interruption! On a related note, we have been observing intermittent sluggishness on /scratch and /data over the last several weeks....
[Resolved] Visualization portal maintenance Saturday morning is now complete
Mar. 14, 2019—Update, March 16: This maintenance is now complete. The ACCRE Visualization Portal will go down for scheduled maintenance on Saturday, March 16th, from 6 AM to 10 AM. This will only affect web access through the Visualization Portal, so users may still run jobs on the cluster and login through the gateway nodes via SSH....
New command: slurm_groups
Mar. 11, 2019—We’ve added a new command to the ACCRE cluster, slurm_groups, that allows you to view your current SLURM group membership. This is especially useful if you have GPU access to the cluster, as it gives you the group and partition that you will need to use. Click the link to go to the documentation.
[Resolved] SLURM scheduler is back online following outage
Mar. 5, 2019—Update, 3/5/2019: The scheduler is now operational. The impact on the cluster queue has been minimal. We are investigating to establish the exact reason of the stuck jobs in order to prevent this to happen again. Thank you for your patience. We are currently experiencing a SLURM overload caused by issues in killing processes related...